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In-Situ Observations of High Temperature Surface Processes on α-Alumina Bulk Crystals

  • Z. L. Wang (a1) and J. Bentley (a2)

Abstract

Reflection electron microscopy (REM) was applied to image in-situ the dynamic changes of atomic-height steps on the surfaces of a-alumina bulk crystals heated to high temperatures. Atomic diffusion, desorption and adsorption processes on cleaved a-alumina (012) surfaces were directly observed at temperatures of 1470 to 1670 K. The surface started to show visible structural changes at 1470–1520 K. The main surface process appears to be atomic desorption, which creates large, flat vacancy-type terraces on the surface.

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1. Yagi, K., J. Appl. Cryst. 20, 147 (1987).
2. See the many articles in: Reflection High-Energy Electron Diffraction and Reflection Electron Imaging of Surfaces, edited by Larsen, P.K. and Dobson, P.J., NATO ASI Series B, Physics, Vol.188 (Plenum Press, New York, 1988).
3. Wang, Z.L. and Howie, A., Surface Science 226, 293 (1990).
4. Wang, Z.L. and Bentley, J., Ultramicroscopy, in press (1990).
5. Osakabe, N., Tanishiro, Y., Yagi, K. and Honjo, G., Surface Science 27, 393 (1980); N. Osakabe, Y. Tanishiro, K. Yagi and G. Honjo, Surface Science 109, 353 (1981).
6. Wang, Z.L. and Cowley, J.M., Surface Science 193, 501 (1988); for a review see Z.L. Wang and J. Bentley, J. Electron Microscopy Techniques, in press (1991).
7. Wang, Z.L. and Bentley, J., Ultramicroscopy, to be submitted (1991).

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